Tailstock clamping means



Jan. T7, "1928. 1,656,351

G. E. GREENLEAF TAILSTOCK CLAMPING MEANS Filed Nov. 25. 1925 INVENTOR ATTORNEY Patented Jan. 17, 1928 U D TATE enoRGE E. GREENLEAF, orPLAINFIELD,,NEW JERSEY, AssIenoR To NILEs-BEMEN'I- POND COMPANY, orNEWYOBK, my A CORPORATION on NEW JERSEY.

mains'rocx (:LAMPme MEANS.

I Application ma November 25,1925. Serial No. 71,353.

This invention relates to lathe tailstocks' and particularly to atailstock for anes of intermediate size. w

An object ofthe invention isto provide an improved'form of clampingmechanism. adapted to securely clamp the tailstock n anyadjustedposition along the bedof a lathe. i

One feature'which enables me to accom plish the above named, object isthat clamping plates arefprovided below the tailstock adapted to engagetheways of the lathe and held by bolts thereto,theseclamps being in theform of levers adapted to have their inner ends forced downwardly toefi'ect the clamping operation. i

Another feature which is advantageous is that a toggle mechanism isprovided on; the tailstock engagingan equalizer member in contact withand adapted to press against y the drawing, I provide a tailstock bodymember which is adapted. to be adjusted the inner ends of the clampinglevers.

Another object of the invention is toprovide threaded means for forcingthis toggle mechanism to its clamping or unclamping position. i Q

With these and other objects in view, my invention consists in thefeatures of construction and operation set forth in the followingspecification and illustrated in the accompanying drawing.

In the accompanying drawing annexed. hereto and forming a part of thisspecifica tion, I have shown my invention embodied in a tailstock for alathe, but it will be understood that the invention can be otherwiseembodied andthat the drawings are not to be construed as defining orlimiting the scope of the invention, the claims appended to thisspecification being relied upon for that purpose.

In the drawing: 1 i

Figure 1 is aside elevation of a complete tailstock, partly in section,and provided with the present invention.

Fig. 2 is a transverse sectionalview taken on the line 2-2 of Fig. 1,and Fig. 3 is a plan view of the clamping levers and equalizer member.

In the above mentioned drawing I have shown but one embodiment of theinvention which is now deemed preferable, but it is to i be understoodthat changes and modifications may be made within the scope of theappended claims without departing from thespirit of the invention. y

Briefly, and in its broadest aspect, my invention comprises thefollowing principal parts: first, a. tailstock body member pro videdwith a movable 'tailstock spindle; sec end, a pair of clamping leversbelow the tailstock and having their outer endsen gaged under portionsof the ways on which the tail-stock is movable; third, bolts sup portingthese clamping levers inposition and forming fulcrums about which theymay os cillate; fourth, an equalizer memberadapted to rest upon theinner or adjacent ends of theclampmg levers; fifth, a system of toggle"levers, one of which is supported within the tailstock body member andthe other in the equalizer member; and sixth, threaded means foroperatingthese toggle levers to move the clamping levers to clampingandunclamping positions. I 1

Reterringmorein detail. to the figures of alongsuitable ways 11 of alathe bed 12. Below the tailstock 10 and adapted to have their outerends engaged under portions of the ways 11 are twoclamping levers 13.These levers13 preferably extend substan tially the entire length of thetailstock 10 at their outer ends and have their inner or adjacent endsbrought closely together be low the mid line of the tailstock. Thelevers are supported by means of bolts 13 passing upward through thetailstock 10 so that they are free to oscillate about the heads of thebolts as fulcrums. Above the adjacent or inner ends of the clampinglevers 13 rests an equalizer member 14 which is held by means of togglelevers 15 and16 in position and disposed so that it may be moved up ordown by the movement of these toggle levers 15 and 16. In order to movethese toggle levers 15 and 16 to clamp or unclampthevlevers 13 againstthe ways 11, a rearwardly extending rod 17 is provided attachedv at itsinner end to a cross pin 18 between the toggle levers 15 and 16. Ro- 1tatably mounted on this rod 17 is a threaded member 19 provided withscrew threads of relatively long lead, this threaded member as shownbeing disposed between collars 20 on the rod 17 so that it may be easilyrotated but cannot move longitudinally upon the rod. In order to rotatethis threaded member 19, its outer end is provided with a handle 21preferably keyed directly thereto levels 15 and 16 to the position shownin,

dotted lines.

What I claim is:

1; A tailstock .f-or lathes. comprising in combination, a body member, apair of opposed clamping leversbelow said body member and adapted toengage the lathe ways. an equalizer member engaging the contiguous endsof said levers. toggle vlevers attached to and supporting said equalizermember, and means to positively actuate said togglelevers to move 821dclamping levers to clam in", and unclam in" osi tion.

2. A tailstock for Iatheslcomprising in combination, a body member, apair of opposed clamping levers below said body member and adapted toengage the lathe ways. an equalizer-member engaginglthecontiguous endsof said levers, toggle levels attached to and supporting. said:equalizer signature.

member, a transversely extending rod attached to the intermediate pointof said toggle levers, and threaded means thereon to actuate said togglelevers to move said clamping levers to damping and unclamping positioni3. A tailstock for lathes comprisin in combination, a body member, apair 0 opposed clamping levers below said body member and adapted toengage the lathe Ways, bolts flexibly supporting said levers in po-'sition, an equalizer:memberuengaging the contiguous ends of saidlevers, togglelevers attached respectively to said body member andequalizer member, and threaded means to positively actuate said. togglelevers in opposite directions to clamp and unclamp' said tailstock. I a

4. A Vtailstock for lathes comprisin in combination, a body; member, apair 0 0pposed clamping leversbelow said body member-and adapted toengage the lathe. Ways, bolts supporting said levers in position, anequalizer member engaging the contiguous ends of said levers. togglelevers attached respectively to said body member and equal izer member,a transversely extending rod,

and thr'eadedmeans thereon adapted to positively actuate said togglelevers in opposite directions to clamp and unclamp said tailstock. l

In testimony whereof, 1 hereto afiix my GEORGE E.. GREENLEAFI

